Glacier Bay HDGFFF4 Basic Defense 6-Month Replacement Water Filter (Fits System HDGFFS4) Easy "no mess" water filter membrane change - no need to turn off your water supply, system goes into automatic bypass to allow for easy filter changes Filters last up to 6 months Water filter reduces: sediment, chlorine taste and odor and cysts Fits Glacier Bay basic drinking water filtration system HDGFFS4 Creates quality water for drinking, cooking, coffee and ice. Promotes healthy hydration for your entire family!